Where is the manhole that wraps the column?

Generally, the manhole of the column is left in the upper-middle position.

Manhole, referred to as manhole, is a kind of manhole needed in the decoration process (manhole or manhole used by technicians to repair the pipes inside the ceiling), such as central air-conditioning pipes, wiring pipes, toilet water supply and drainage pipes, etc. The birth of the finished manhole filled the gap in the domestic market and was widely used in government departments, airports, star-rated hotels, hotels, office buildings, residential buildings, villas, shops and other office and home places. This product is easy to transport, easy to construct, not easy to be damaged, has the characteristics of fire prevention and environmental protection, and is deeply loved by users.